Fishing tool



P? 1929. J. F. CAILLOUX 94 FISHING TOOL 7 Filed July 9, 1927 INVENTOR.

Gaillazz 2;

Patented Apr. 2391929.:

UNITED STATES 1 1,710,294 PATENT OFFICE.

JOHN F. CAILLOUX, OF OKLAHOMA CITY, OKLAHOMA.

FISHING moon.

Application filed July 9,

This invention relates to fishing toolsand use in lishing for devices of this sort which are of different sizes and which will permit the device to be removed where the same is embedded in a layer of mud, dirt or bits of rock which have fallen from the walls of the well.

A further and more specific object of the invention is to provide a slip construction for use in a fishing tool of this character which is especially adapted for the engagement of and cheaply produced. a 1

These and other objects I attain by the constructionshown in the acconipanying drawing, wherein for the purpose of illustratipn is shown a preferred embodiment of my 1nvention and wherein Figure 1 is a vertical sectional view through a fishing tool constructed in accordance with 1 my invention;

Figure 2 is a section on the line 22 of: Figure 1;

Figrn'e 3 is a side elevation of the slip detached. i p

te'terring now more particularly to the drawing, the numeral 10 generally designates a bowl provided interiorly adjacent its bottom with a downwardly tapering seat 11. This bowl is engaged at its upper end by a head or top 12, which serves both as a coupling for connecting the bowl to a pipe string and as a stop lin'riting upward. movement of a,

slip 13 arranged within the bowl and coa'cting wi th the seat. The slip will hereinafter be more fully described.

At the lower end, the bowl pro vidcd with a crnubined guide and milling cutter 14 consi .ing of an annular shoe the lower face of which inclines upimrdly and inwardly and is provided with rock teeth 15. These teeth will i cut through rock or soil interfering with the passage of the bowl upon rotation of the bowl and will act to deliver any harder substance suchas the roller of a rock hit to the bore of the bowl. I a y The slip 13 comprises a sleeve having at its upper and adjacent its lower end portions such articles and which may be very readily formed by the slits 22 may converge 1927. Serial No. 204,523.

16 and 17 of slightly less diameter than the bore 18 otthe bowl above the seat 11. Below the portion 17, the exterior of the sleeve tapers (.lownwardly, as indicated at lt with the same taper as that given the seat 11. Between the portions 16 and 17 the exterior of the sleeve is relieved, as at 20, for a purpose presently to appear. The bore of the sleeve tapers upwardly and is provided with upwardly facing ratchetteeth 20. i l The sleeve is vertically split at one point, as indicated at 21.,and at a plurality of other points is split from its lower end to a point innnediately below the upper bore fitting portion 16, as indicated at By splitting the sleeve at 21.; the entire sleeve may contract, while the slits 22 form at the lower end of the sleeve a pluralityiof independently movable portions, the resistance of which to movement reduced by the relieving of the exterior of the sleeve at 20. The slip 13 is free to rotate in the bowl and it will lie-obvious that any hard substance which cannot be cut by the cutters 19 and which is directed to thebore of the bowl will pass upwardly through the slip until it becomes firmly wedged therein. so that when the bowl is lifted, the element will be lifted therewith. This element of its own weight will urge the slip 13 downwardly so that the independently movable portions and more tightly grip the element.

Since the construction hereinbctl'tore set :t'orth is capable of a certain range oi change and modification without materially depart .ing from the spirit Off the invention I do not limit myself to such specific structure except as hereinafter claimed.

I claim I 1. A fishing tool for removing the cutting elements of rocks drills and the like from well bores comprising a bowl, a rock milling shoe at the lower end of the bowl having an upwardly tapering lower face directing uncuttnble articles upwardly through the bore otthc bowl anda slip in the bore otthe bowl for grasping such articles with a lifting grip derived from the resilience oi the slip itself, said slip comprising a relatively thin sleeve having a thickened upper end, said sleeve being vertically splituat one end and at a plurality of other points slit from its bottom to a point immediately beneath said thickened portion, the interior of the sleeve having grasping teeth. and being tapered from its lower toward its upper end.

2. A fishing toolfor removing the cutting elements of r ck drills and the like from well bores comprlsing a howl a rock milling shoe at the lower end of the bowllmving emi wardly tapering lower face dlrecting uncuttable articles upwardly through the bore of:v

the bowland a slip in the bore of the bowl for grasping such articles with a liftihg giip de-' rived from the resilience of the slip itself, said slip comprising a relatively thin sleeve having a thickened upper end, said sleeVefbeing'vertically split at on'e'point and at apl'u rality'ot other points slit'fronr its bottom to a point immediately beneath said thickened portion, the interior of the sleeve having grasping teeth; the exterior of the sleeve at its lower end taperingdownwardly, the bowlhaving a tapered'seatior coaction'with the downwardly tapering portionof the slip.

3. Afishing tool for removing the cutting elements of rock drills and the like from well bores comprising a howl a rock milling shoe at the lower end oft-he bowl having an upwardly tapering lower face directing uncuttable articles upwardly through the bore of the bowl and a bodily expansible resilient slip in the hereof-thehowl'for grasping such articles said slip having an upwardly tapering toothed bore, the teeth of said slip engagingth'e article with a lifting grip derived from the resi'licncy'of the slip independently of downward movement of'the slip in the bore downward movement-"of the 'slip in the bore causing contraction thereof.

In testimony whereof I hereunto affixmy signature;

JOHN ,F. CAIL'LOUX. 

